Engine cranks but won’t start
Difficulty starting, especially after sitting
Engine sputtering or hesitation at higher speeds
Loss of power under load or during acceleration
Unexpected stalling while...
Slipping gears
Delayed engagement when shifting
Grinding or shaking during shifts
Burning smell
Transmission fluid leaks
Warning lights on the dashboard
Strange noises in neutral or while driving
Difficulty shifting into...
Slipping gears
Delayed engagement when shifting into drive or reverse
Rough, hard, or jerky shifting
Transmission fluid leaking under the vehicle
Burning smell from the transmission
Grinding, whining, humming,...
Engine won’t start
Engine cranks but won’t fire
Ticking or clicking noise from the engine
Rough idling
Misfiring
Loss of power
Engine stalls
Check engine light is on
Visible cracks on the...
Recover any remaining refrigerant with approved recovery equipment
Turn off the engine and disconnect the negative battery terminal
Connect a manifold gauge set to the high-...
Warm the engine to operating temperature
Turn off the engine
Disable fuel and ignition systems
Remove all spark plugs
Bring cylinder 1 to top dead center on the...
Fix the underlying issue causing the check engine light
Read the diagnostic trouble codes with an OBD-II scanner
Repair or replace the faulty part
Clear the codes...
Fix the underlying airbag/SRS fault first
Check the vehicle battery and charging system
Inspect and reseat airbag-related connectors under seats and in the steering wheel area
Replace...
Warm the engine to operating temperature, then shut it off
Disable the ignition system and fuel system
Remove all spark plugs
Open the throttle fully
Thread a compression...
Disconnect the battery
Raise and support the vehicle if needed
Remove the engine covers and accessory drive belts
Remove components blocking access to the timing belt
Set the...
Verify the battery is fully charged
Check that the battery terminals are clean and tight
Locate the starter relay
Inspect the relay and wiring for damage, corrosion,...
Remove the spark plug from the engine
Inspect the plug for cracks, heavy carbon buildup, oil fouling, or worn electrodes
Check the electrode gap with a...
Locate the purge valve
Disconnect the electrical connector
Remove the vacuum hose
Check for visible damage or cracks
Apply vacuum to the valve
Verify the valve holds vacuum when...
Locate the fuel pump relay in the fuse/relay box
Remove the relay from its socket
Inspect the relay and socket for damage, corrosion, or burnt terminals
Identify...
Locate the EGR valve
Inspect the valve, vacuum lines, and electrical connector for damage
Check for stored trouble codes with an OBD-II scanner
Start the engine and...
Let the engine cool completely
Locate the coolant temperature sensor
Disconnect the sensor electrical connector
Inspect the connector and wiring for damage, corrosion, or loose pins
Check the...
Check for diagnostic trouble codes with an OBD-II scanner
Inspect for rattling noises from the converter
Compare inlet and outlet temperatures with an infrared thermometer
Measure exhaust...
Turn off the ignition and disconnect the battery negative terminal
Locate the ignition coil and disconnect all electrical connectors
Remove the coil from the vehicle if...
Turn the AC off and disconnect power
Inspect the compressor for visible damage, oil leaks, or burnt wiring
Check the breaker, fuse, and disconnect for proper...
Gather the sensor datasheet, a multimeter, and a known reference thermometer
Disconnect power to the sensor circuit if required by the manufacturer
Inspect the sensor and...
Locate the purge valve and disconnect the electrical connector
Inspect the valve and hoses for cracks, damage, or loose connections
Check the valve resistance with a...
Check the fuel pump fuse
Check the fuel pump relay
Listen for pump priming at key-on
Test fuel pressure with a fuel pressure gauge
Compare pressure to manufacturer...
Slipping gears
Delayed engagement when shifting into drive or reverse
Rough, hard, or jerky shifting
Transmission warning light or check engine light
Burning smell
Grinding or shaking during acceleration
Unusual...
Slipping gears
Delayed engagement when shifting
Rough or hard shifting
Grinding or shaking during shifts
Transmission fluid leaks
Burning smell
Transmission warning light
Unusual noises in neutral or while driving
Poor acceleration
Hesitation...
Engine clicks but does not crank
Starter cranks slowly or intermittently
Single loud click when turning the key
Grinding noise when starting
Starter keeps spinning after the engine...
Slow or weak cranking
Clicking sound when turning the key
Intermittent starting
Grinding noise when starting
Starter stays engaged after the engine starts
Burning smell near the starter
Smoke from...
Key turns but nothing happens
Engine cranks intermittently
Engine stalls while driving
Accessories work inconsistently
Dashboard lights flicker or go out
Key feels loose in the ignition
Key is hard...
White smoke from the exhaust
Milky or frothy oil on the dipstick or under the oil cap
Coolant disappearing with no visible leak
Engine overheating repeatedly
Bubbling in...
White exhaust smoke, especially after the engine warms up
Sweet smell from the exhaust or engine bay
Engine overheating repeatedly
Coolant level dropping with no visible external...
Engine won’t start
Engine cranks but won’t fire
Rough idling
Misfiring
Loss of power
Ticking or clicking noise from the engine
Check engine light on
Visible cracks or fraying on the...
Check engine light is on
Engine misfires
Rough idle
Hard starting
Poor acceleration
Reduced fuel economy
Engine stalling
Backfiring
Strong fuel smell from exhaust
Visible cracks or damage on the coil pack
Burn marks...
Check engine light is on
Rough idle
Engine stalls or hesitates
Poor acceleration
Hard starting
Black exhaust smoke
Poor fuel economy
Engine runs too rich or too lean
Unstable idle speed
Trouble codes...
Key turns but dashboard lights do not come on
Engine does not crank when the key is turned
Intermittent starting problems
Engine stalls while driving
Accessories work inconsistently...
Squealing or screeching when braking
Grinding noise when braking
Brake warning light on
Longer stopping distance
Brake pedal feels soft, spongy, or low
Car pulls to one side when...
Dim or flickering headlights
Battery warning light on the dashboard
Slow or weak power windows, radio, or accessories
Dead battery that keeps coming back after charging
Engine stalling...
